Gaming laptop: movements draw shadows?

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- in Asus
2

I recently bought an Asus gaming laptop for the first time. Now I have the problem that black shadows arise when gaming or simply scrolling.

What can that be? How do I fix the problem?

I use the GeForce RTX 2070

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For me, changing the Hz number on my monitor helped.

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I tried it, but it must be something else.